util.c File Reference

contains useful utility functions More...

#include "util.h"
#include <stdlib.h>
#include <unistd.h>
#include "def.h"

Go to the source code of this file.

Functions
int	DEC_UNTIL_ZERO (int x)
	decrements a signed number by one, but not past zero
errorcode	safe_free (void *memory)
	a 'safe' free
errorcode	wait_for_flag (flag_t *check_flag, flag_t stop_flags, int timeout)
	waits for a flag to take one of many specified values

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Detailed Description

contains useful utility functions

Author:

Daniel Ferullo (ferullo@cmu.edu)

Definition in file util.c.

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Function Documentation

int DEC_UNTIL_ZERO (  int  x  )  [inline]

decrements a signed number by one, but not past zero Parameters: x  The number to decrement Returns: The decremented value Definition at line 31 of file util.c. Referenced by find_conn2(), get_buddy(), and wait_for_flag().

errorcode safe_free (  void *  memory  )

a 'safe' free Parameters: memory  pointer to the memory to free Returns: SUCCESS, errorcode on failure Definition at line 35 of file util.c. References CHECK_NOT_NULL, ERROR_NULL_ARG_1, and errorcode. Referenced by create_new_handler(), list_destroy(), list_remove(), readMsg(), run_direct_conn_connect(), run_helper_fsm_thread(), sendMsg(), and start_direct_conn().

errorcode wait_for_flag (  flag_t *  check_flag, flag_t  stop_flags, int  timeout )

waits for a flag to take one of many specified values Success if the check_flag takes on any one of the stop_flags before timeout Parameters: check_flag  pointer to the flag to watch stop_flags  all the flags to wait for or'ed together. timeout  the timeout time, in seconds Returns: SUCCESS, errorcode on failure Definition at line 48 of file util.c. References CHECK_NOT_NEG, CHECK_NOT_NULL, DEC_UNTIL_ZERO(), ERROR_NEG_ARG_3, ERROR_NULL_ARG_1, and errorcode. Referenced by wait_and_join_find_synack(), wait_for_buddy_bday_port(), wait_for_buddy_port_alloc(), wait_for_buddy_port_known(), wait_for_buddy_syn_flood(), wait_for_buddy_syn_seq_num(), and wait_for_direct_conn().

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